29157278561 has 8 divisors (see below), whose sum is σ = 30881268864. Its totient is φ = 27434272320.

The previous prime is 29157278539. The next prime is 29157278567. The reversal of 29157278561 is 16587275192.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29157278561 - 2⁶ = 29157278497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29157278567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184565 + ... + 303938.

It is an arithmetic number, because the mean of its divisors is an integer number (3860158608).

Almost surely, 2^29157278561 is an apocalyptic number.

It is an amenable number.

29157278561 is a deficient number, since it is larger than the sum of its proper divisors (1723990303).

29157278561 is a wasteful number, since it uses less digits than its factorization.

29157278561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492031.

The product of its digits is 2116800, while the sum is 53.

The spelling of 29157278561 in words is "twenty-nine billion, one hundred fifty-seven million, two hundred seventy-eight thousand, five hundred sixty-one".